Theravada BuddhismThe Theravada Buddhists believe that they practice the original form of Buddhism as it was handed down to them by Buddha. Theravada Buddhism dominates the culture of Sri Lanka, but is also very prominent in Thailand and Burma.While Siddhartha Gautama, the Buddha, spent several decades teaching, none of his teachings were written down until several hundred years later. In the third century, Asoka, the great Mauryan emperor, converted to Buddhism and began to sponsor several monasteries throughout the country. He even sent missionaries out to various countries both east and west. During his reign, the teachings of Buddha spread all across India and Sri Lanka. Disturbed by the prolific growth of Buddhist heresies, a council of Buddhist monks was convened at the Mauryan capital of Patna during the third century BC to purify the doctrine. What arose from that council, more or less, were the definitive teachings of Theravada Buddhism; from this point onwards, Theravada Buddhism undergoes little if any change